Investments (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Investments
Fair value of investments	$ 19,090,000		$ 19,090,000		$ 18,310,000
Investments (realized and unrealized gains/(losses))	(139,000)	368,000	(7,000)	(318,000)
Investment in FATV
Investments
Fair value of investments	15,876,000		15,876,000		15,863,000
Total partnership capital	63,400,000		63,400,000		63,700,000
Share in management fee income	200,000	200,000	400,000	300,000
Employee Investment Funds, net of Company's ownership interest
Investments
Fair value of investments	1,214,000		1,214,000		1,247,000
Other investment
Investments
Fair value of investments	$ 2,000,000		$ 2,000,000		$ 1,200,000